FR2695540A1 - Kneader. - Google Patents

Abstract

Kneader having a dough material distribution inlet (20) and a dough discharge outlet (26) to the upper and lower portions of a housing (2), in which a mixing member (4) is arranged. The kneader further comprises at least one metal shutter (24, 30) for opening and closing the dough material delivery inlet (20) and the dough discharge outlet (26), and a guide rail in contact with it. said at least one metal shutter for guiding the movement of the shutter on a determined path, the guide rail being made of a synthetic resin and comprising means arranged at the front end of said at least one shutter for removing the paste material on the path of the shutter.

Description

PETRIN

  The present invention generally relates to a kneader More particularly, the present invention relates to a kneader, in

  which a material distribution inlet and a distribution outlet

  dough charge are located at the upper and lower portions of a housing comprising within it a mixing member. A kneading machine comprising a dough material distribution inlet and a dough discharge outlet at the upper portions and

  bottom of a housing comprising within it a metering organ

  swaddle has a flap at the pulp material distribution inlet and the pulp discharge outlet to close the inlet and the

  outlet during kneading, open the flap at the dispensing inlet

  dough material during material distribution and or-

  screw the flap to the pulp discharge outlet during the pulp discharge.

  Generally, the shutter is made of a metal plate.

  let is supported on the housing by guide rails mounted on the fixed portion of the housing and a plurality of bronze rods

  with zinc arranged along the guide rails.

  In the classic kneader described above, when closing

  of the shutter, that is to say when closing the dispenser entrance

  dough material and the dough discharge outlet, a pro-

  may appear due to the presence of paste material

  on the shutter path for opening and closing Or-

  tre, the dough material can be wedged between the front end

  flap and the peripheral edge of the pulp material distribution inlet or the pulp discharge outlet and block

  completely closing the shutter.

  In addition, given the presence of dough material on the tra

  jectory for opening and closing the shutter and the non-uniform friction resistance between the shutter and the guide rails and / or the rods in zinc bronze, the shutter can tilt during

  open and close and wear the zinc bronze rods.

  The wear of the zinc bronze rods causes a friction contact.

  Directly between the main body of the kneader and the flap The wear also creates small parings or particles of metal which mix with the material, which is unacceptable for a food product. With regard to the aforementioned problems, the present invention aims to propose a kneading machine which comprises flaps facilitating the complete closure of a material distribution inlet to

  dough and a dough discharge outlet.

  The present invention also aims to provide a

  kneader in which the flap can slide while keeping perma-

  nence its parallelism so as not to be worn out by the structure

  ture which supports it and that the risk of mixing parings or

  metal particles with the material be removed.

  To achieve the above objectives as well as other objec-

  tifs, a kneader, according to an aspect of the present invention, which comprises

  carries a paste material distribution inlet and an outlet

  dough discharge to the upper and lower portions of a lo-

  gement, comprising within it a mixing member, comprises: at least one metal shutter for opening and closing the pulp material distribution inlet and the pulp discharge outlet; and

  a guide rail in contact with said at least one flap

  metal to guide the movement of the shutter on a determined path, the guide rail being made of a synthetic resin and comprising a means disposed at the anterior end of said at least one shutter for removing the dough material on the path

of the shutter.

  In the preferred construction, at least one flap has a front end hollowed out to receive the means for removing dough material within a recess. Preferably still, at least one flap has a first portion extending over the means of removing paste material on one side and a second portion extending over the means for removing paste material on the other side, the second portion extending beyond the

  position of the anterior end of the first portion The mo-

  yen material removal may include in practice

  means for discharging compressed air.

  The guide rail can contact the upper surfaces and

  lower and the lateral edge of said at least one flap In the cons-

  preferred truction, the synthetic resin forming the guide rail

  can be selected from resins with the following properties

  Vantes: low coefficient of friction, resistance to wear,

  high impact resistance, flexibility, resistance to

  chemical plates, workability, safety, insensitivity to

  water, and for example be polytetrafluoroethylene.

  A sliding shutter structure for kneading machine to close with

  possibility of opening at least one distribution outlet for ma-

  dough material and a dough discharge outlet of a housing, in which a mixing element is arranged, comprises:

  a movable flap between an open position and a closed position

  mée relative to the pulp material distribution inlet and

  at the dough discharge outlet to open or close as desired

  these; a guide rail guiding the sliding of the shutter between the

  open and closed positions, the guide rail being made of a

  selected material having at least the following properties: low coefficient of friction, wear resistance, high impact resistance, flexibility, resistance to chemical attack, workability; and

  means for removing dough material supported at an ex-

  front end of the flap to remove the dough material remaining on a path of the flap guided by the guide rail. The present invention will appear more clearly in light

  of the detailed description below and of the attached drawings of the

  preferred embodiment of the invention, which, however, should not

  may not be considered as limiting the invention, but being

  given for explanatory and illustrative purposes only.

In the drawings:

  Figure 1 is a vertical section of the pre-embodiment

  bait of a kneader according to the present invention; Figure 2 is a vertical section of the kneader taken along line 11-II of Figure 1; and

  FIG. 3 is a perspective view of the end portion

  front tee of a flap of a discharge outlet.

  Below is a detailed description of the mode of

  preferred embodiment of a kneader according to the present invention The

  generally comprises a substantially cylindrical housing 2 which is arranged horizontally, a flat disc-shaped side plate 6 which is provided with a kneading screw 4 in a position lower than the center and closing an axial end

  of housing 2, and an actuatable cover 8 closing with pos-

  sibility of opening the other axial end of the housing 2.

  The kneading screw 4 comprises three screw elements 4 a,

  each comprising two blades The screw elements 4 a are sup-

  carried in an orientation spacing them angularly by 600 La

  kneading screw 4 has a diameter equal to about a third of the diameter

  meter of housing 2 and is adapted to be driven by a drive motor 10 at a speed of approximately 1000 rpm Other

  hand, a rotary scraper 1 2 is mounted on the cover or

  groove 8, which is used to scrape off the adhered paste material

  rant on the internal surface of the housing 2 The rotary squeegee 1 2 is rotated by a drive motorl 4 for

  rotate at a speed of about 25 rpm so that it moves

  cer very close to the internal surface.

  At an upper portion of the housing 2 are arranged a dough material dispensing inlet 20 for dispensing the dough material and an additive dispensing inlet 22 for dispensing the salt necessary for kneading and spices, oil

  etc. An entry flap 24 for opening and closing the distribution entrance

  bution of pulp material 20 is driven back and forth at the mo-

  yen of a hydraulic cylinder 25 On the other hand, in a lower portion

  of the housing 2, an outlet flap 30 for opening and closing a dough discharge outlet 26 is driven back and forth by

a hydraulic cylinder 32.

  Note that the paste material distribution inlet 20

  and the pulp discharge outlet 26 have a sensitive construction-

  therefore identical, the detailed description given below

  below relative to Figures 2 and 3 emphasizes the output

dough discharge.

  As shown in Figures 2 and 3, the outlet flap 30

  of the dough discharge outlet 26 is supported so that it

  smooth by a pair of guide rails 50, 52 and 54 The material of the guide rails 50, 52 and 54 can be selected from materials having the following properties: low coefficient of friction, wear resistance, high impact resistance ,

  flexibility, resistance to chemical attack, ability to work

  swimming, harmlessness, insensitivity to water, etc., for example

  polytetrafluoroethylene (from Teflon, a registered trademark), a poly-

  extremely high molecular weight ethylene, etc. The guide rail 50 is in contact with the upper surface of the outlet flap 30 On the other hand, the guide rail 52 is in contact with the air injection orifices 64 on the edge lateral disposed within the recess 62 for injecting compressed air The end

  front of the outlet flap 30 to the underside of the recess

  ment 62 extends forward beyond the end position

  anterior to the upper face of the recess.

  The operation of the kneader constructed as above is

  described below At the start of actuation of the kneader, a dis-

  tance between the guide rail 52 and the outlet flap 30 is

  glued by means of the adjustment screw 56 to about 0.1 mm Then, the paste material distribution inlet 20 is open to distribute the paste material in the housing 2 After, during the injection of air compressed by air injection ports 64

  of the air discharge tube 66, the inlet flap 24 is driven up to

  only in the closed position so as to close the dispensing inlet

  dough material 20 So the dough material left on the

  closing path of the inlet flap 24 can be driven out.

  Then, the kneading screw 4 and the rotary scraper 14 are

  rotational drag The desired additives are distributed by

  the additive distribution inlet 22 during the kneading operation

  sage After kneading, the dough discharge outlet 26 is opened by actuating the outlet flap 30 to the open position while the kneading screw 4 and the rotary scraper 12 continue to rotate so as to discharge the dough

housing.

  According to the present invention, the metal shutter is supported by the guide rails made of a resin and contacting the surface

  upper, the side edge and the lower surface of the pane

  tre, the shutter is constructed so as to include a reduction portion for projecting the lower face towards the front and the air discharge tube positioned at the reduction portion Thus, according to the present invention, the dough material or the dough remaining in the path of the flap can be expelled by the compressed air injected via the air discharge tube in order to allow the flap to completely close the dough material distribution inlet or the corresponding dough discharge outlet. moreover, the sweeping of the dough material or of the dough makes it possible to keep the flap horizontal so that it can always move in parallel In addition, as the flap is never worn by its support structure,

  metal scraps or particles are never found mixed

dough.

  Although the present invention has been described and illustrated,

  later to an embodiment by way of example, it appears

  tra to those skilled in the art that the changes that pre-

  yield as well as other changes, omissions and additions

  can be brought, without going out of the mind or out of the box

  dre of the present invention Thus, the present invention is not to be understood as limited to the specific embodiment described above but as comprising all the embodiments

  possible that can be implemented within the scope of the pre-

  invention and their equivalents with respect to

  characteristics of the appended claims.

Claims (11)

  1 Mixer with a material distribution inlet to   dough (20) and a dough discharge outlet (26) with the upper portions   lower and lower of a housing (2), comprising within it a mixing member (4), comprises: at least one metal flap (24, 30) for opening and closing   the paste material distribution inlet (20) and the dispensing outlet   charge of dough (26); and a guide rail (50) in contact with said at least one metal flap for guiding the movement of the flap over a determined path, the guide rail being made of a synthetic resin and comprising means (64, 66) arranged at the anterior end   said at least one flap for removing the dough material on the track flap jectory.   2 kneader according to claim 1, wherein said at least one flap (30) has a front end recessed to receive the removal means (64, 66) of dough material within a recess (62).   3 kneader according to claim 1, wherein said at least one flap (30) has a first portion extending over said au minus one strand.   4 kneader according to claim 2, wherein said means for   lifting (64, 66) of dough material includes means for removing compressed air charge.   A kneader according to claim 1, wherein said guide rail (50) contacts the upper and lower surfaces and the edge lateral of said at least one flap.   6 A mixer according to claim 1, wherein said resin syn-   the thetic forming said guide rail (50, 52, 54) is selected from resins having the following properties: low coefficient of friction, wear resistance, resistance to high impact, flexibility, resistance to chemical attack,   workability, harmlessness, insensitivity to water.   7 kneader according to claim 6, wherein said resin syn-   thetic is polytetrafluoroethylene.   8 A kneader according to claim 6, wherein said resin syn-   thetic is extremely high molecular weight polyethylene.   9 kneader according to claim 5, which further comprises a mo-   yen associated with said guide rail (52) to adjust the position of said   guide rail relative to the lateral edge of said flap (30).   Sliding shutter structure for kneading machine to close with   possibility of opening at least one distribution outlet for ma-   dough material (20) and a dough discharge outlet (26) of a housing   ment (2), in which a mixing element is arranged, including nant:   a flap (24, 30) movable between an open position and a po-   closed position relative to the dough material distribution inlet (20) and the dough discharge outlet (26) for opening or   optionally close these; a guide rail guiding the slide   ment of said flap between said open and closed positions, the   said guide rail being made of a selected material having at least the following properties: low coefficient of friction, wear resistance, high impact resistance, flexibility, resistance to chemical attack, workability; and means (64, 66) for removing pulp material supported at an anterior end of said flap (30) for removing pulp material remaining on a path of said flap guided by said guide rail (52).   11 sliding shutter structure according to claim 10, in   which said guide rail is made of a synthetic resin   selected from polytetrafluoroethylene and a polyethylene of   extremely high molecular weight.   12 sliding shutter structure according to claim 10, wherein said shutter (30) comprises a first and a second   end portion forming a recess (62) extending transversely   versally to said front edge, and said means for removing   dough material (64, 66) is received in said recess (62).   13 sliding shutter structure according to claim 12, wherein said second end portion extends beyond the   position of the anterior end of said first portion of ex- extremity.